[Dev-C++] <incomplete type> shown in the debugger

[Wagner, F. <F.W...@wi...>]

Hi all,

I did somthing like:

<--
#include <fstream>

int		len;
ifstream	instream;

instream.open(Filename.c_str(), ios::binary);

instream.seekg(0, ios::end);
len =3D instream.tellg();
instream.seekg(0, ios::beg);

-->

This compiles well but when I run this in the debugger I get instream as
<incomplete type>
and the the instream.tellg(); will return a -1.

This is taken from a exampler at: 
http://www.cplusplus.com/reference/iostream/istream/tellg.html

Has the incorrect len something to do with these incomplete type thing=
=3F

How might I solve the problem=3F

Thanks in advance

Frank
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